declare namespace Ext {
    export namespace selection {
        export interface CheckboxModelConfig {
            allowDeselect?: boolean;
            checkOnly?: boolean;
            enableKeyNav?: boolean;
            headerAriaLabel?: string;
            headerDeselectText?: string;
            headerSelectText?: string;
            headerText?: string;
            ignoreRightMouseSelection?: boolean;
            injectCheckbox?: number | string;
            listeners?: object;
            mode?: "SINGLE" | "SIMPLE" | "MULTI";
            pruneRemoved?: boolean;
            rowDeselectText?: string;
            rowSelectText?: string;
            showHeaderCheckbox?: boolean;
            toggleOnClick?: boolean;
        }

        export class CheckboxModel extends Ext.selection.RowModel  {
            public getHeaderConfig(): void;
        }
    }
}